Fireworks in supemova 1987a. the light show from supernova 1987a is still continuing. learn more about how supernova 1987a is changing and what we might expect to see from it in the future. summarize your findings in a one- to two-page report.

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units